Modular display stand base



FIG. 1 is a perspective view of a modular display stand base showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom view thereof; and,

FIG. 4 is a side view thereof.

The broken line features are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a modular display stand base, as shown and described. 